A kind of electrical-conductive nanometer fluorocarbon coating
Technical field
The invention belongs to the protective system technical field, more precisely, relate to a kind of electrical-conductive nanometer fluorocarbon coating.
Background technology
The ground net zinc-plated carbon steel of drawing materials is in the majority, and this material, in complicated edatope, is corroded inevitable.Especially moist rainy area, the galvanized steel used 3~5 years all can occur by the situation of heavy corrosion, even ruptures, and causes a lot of structure deteriorate and power outage.1), adopt copper or copper sheathed steel material therefore, ground net is anticorrosion is important research topic of power system always, and at present ground net safeguard procedures commonly used have:; 2), utilize negative electrode to implement protection; 3), use friction reducer to fall resistance; 4), use the electrically conducting coating conduction.These safeguard procedures respectively have also defectiveness of advantage.For example galvanic protection, though construction is simple, maintenance cost is large; Use friction reducer, difficulty of construction is large, the condition harshness, and anticorrosion cost is high; Although, and employing copper or copper sheathed steel material are very corrosion-resistant, expensive and contaminated soil, even bring disaster to contiguous steel framed structure galvanic couple.And the recently appearance of conductive anti-corrosion coating has changed this situation, its efficiency is high, it is convenient to construct, and is subject to extensive concern at the earth mat corrosion-resistant field very soon.But: 1), most of electrically conducting coating draw materials ordinary epoxy resin, urethane or acrylic resin, their time in edatope has been grown easy aging, degraded and cracking; 2), conductive filler material Graphite Powder 99, aluminium powder, copper powder, silver powder commonly used all exists electroconductibility not strong, easily oxidation, expensive shortcoming; 3), the resistance to elevated temperatures of these electrically conducting coatings is poor, so that heat up rapidly when earth mat meets with thunder and lightning or short trouble, loses efficacy, and do not reach preservative effect.
Summary of the invention
The technical problem to be solved in the present invention is, for the defect of prior art, provides the substitute of a kind of electrical-conductive nanometer fluorocarbon coating as traditional ground net protective system, solves the technical barrier that the ground net protective system has conduction, ageing-resistant, resistance to elevated temperatures concurrently.
Technical scheme of the present invention is that a kind of electrical-conductive nanometer fluorocarbon coating provided adopts the raw material of following weight per-cent to mix composition:
The caliber of wherein said modified carbon nano-tubes is Ф 5~100nm, pipe range 0.1~50 μ m; The diameter of section of described modified Nano carbon fiber is Ф 1~50nm, long 1~1000 μ m.
Described modified carbon nano-tubes adopts following raw material and step to be made:
(1), get the CNT (carbon nano-tube) identical with above-mentioned modified carbon nano-tubes weight part, drop in propanol solution, be configured to the propanol solution that mass concentration is 2~8%, perhaps, drop in butanol solution, be configured to the butanol solution that mass concentration is 2~8%, sonic oscillation 20~40min, evenly mix, obtain the CNT (carbon nano-tube) mixed solution;
(2), by the weight ratio of step (1) gained CNT (carbon nano-tube) mixed solution 1-3%, getting silane coupling agent drops in deionized water, be configured to the aqueous solution that mass concentration is 2~6%, use oxalic acid to regulate pH value to 8~10, sonic oscillation 10~30min, make the prehydrolysis in deionized water of thrown silane coupling agent, obtain the silane coupling agent hydrolyzed solution;
(3), step (2) gained silane coupling agent hydrolyzed solution is added in step (1) gained CNT (carbon nano-tube) mixed solution, stir, insert sonic oscillation 3-10h in 70~90 ℃ of temperature environments and obtain the modified carbon nano-tubes finished product;
Described modified Nano carbon fiber adopts following raw material and step to be made:
(4), get the carbon fiber identical with above-mentioned modified Nano carbon fiber weight part, drop in propanol solution, be configured to the propanol solution that mass concentration is 2~8%, perhaps, drop in butanol solution, be configured to the butanol solution that mass concentration is 2~8%, sonic oscillation 20~40min, evenly mix, obtain the carbon nano fiber mixed solution;
(5), by the weight ratio of step (4) gained carbon nano fiber mixed solution 1-3%, getting silane coupling agent drops in deionized water, be configured to the aqueous solution that mass concentration is 2~6%, use oxalic acid to regulate pH value to 8~10, sonic oscillation 10~30min, make the prehydrolysis in deionized water of thrown silane coupling agent, obtain the silane coupling agent hydrolyzed solution;
(6), step (5) gained silane coupling agent hydrolyzed solution is added in step (4) gained carbon nano fiber mixed solution, stir, insert sonic oscillation 3-10h in 70~90 ℃ of temperature environments and obtain modified Nano carbon fiber finished product;
The invention has the beneficial effects as follows:
1), the add-on that can make conductive filler material is up to 40%, greatly improved the add-on of conductive filler material.And the mutual bridge joint of CNT (carbon nano-tube) and carbon nano fiber, form the conductive network structure, makes product have therefrom high conductivity, and its volume specific resistance also can reach 1 * 10
-5the Ω cm order of magnitude;
2), the strong bonding force of the fluorine carbon geochemistry in polyfluoroethylene resin is extremely strong, so the use of polyfluoroethylene resin makes product greatly improve high thermal resistance and thermostability, can stand the impact of large electric current;
3), the anti-atmosphere of polyfluoroethylene resin, water-fast, anti-soil function product is obtained good Corrosion resistance energy, the especially corrosion of acid resistance soil, work-ing life can be for 20 years;
4), non-maintaining between the usage period, high comprehensive performance in life cycle management, cost performance is high;
5), be widely used in the strong Grounding Grid of Large Substation of the soil corrosions such as acid soil or saltings anticorrosion.
Embodiment
Embodiment 1: at first, adopting following raw material and step to make caliber is Ф 5nm, the modified carbon nano-tubes that pipe range is 0.1 μ m:
(1), get CNT (carbon nano-tube) 16 ㎏, drop in propanol solution, be configured to the propanol solution that mass concentration is 2%, sonic oscillation 20min, evenly mix, and obtains the CNT (carbon nano-tube) mixed solution;
(2), by the weight ratio of step (1) gained CNT (carbon nano-tube) mixed solution 1%, getting silane coupling agent drops in deionized water, be configured to the aqueous solution that mass concentration is 2%, use oxalic acid to regulate pH value to 8, sonic oscillation 10min, make the prehydrolysis in deionized water of thrown silane coupling agent, obtain the silane coupling agent hydrolyzed solution;
(3), step (2) gained silane coupling agent hydrolyzed solution is added in step (1) gained CNT (carbon nano-tube) mixed solution, stir, insert sonic oscillation 3h in 70~90 ℃ of temperature environments and obtain the modified carbon nano-tubes finished product;
Secondly, adopting following raw material and step to make diameter of section is Ф 1nm, the modified Nano carbon fiber of long 1 μ m:
(4), get carbon fiber 4 ㎏, drop in propanol solution, be configured to the propanol solution that mass concentration is 2%, sonic oscillation 20min, evenly mix, and obtains the carbon nano fiber mixed solution;
(5), by the weight ratio of step (4) gained carbon nano fiber mixed solution 1%, getting silane coupling agent drops in deionized water, be configured to the aqueous solution that mass concentration is 2%, use oxalic acid to regulate pH value to 8, sonic oscillation 10min, make the prehydrolysis in deionized water of thrown silane coupling agent, obtain the silane coupling agent hydrolyzed solution;
(6), step (5) gained silane coupling agent hydrolyzed solution is added in step (4) gained carbon nano fiber mixed solution, stir, insert sonic oscillation 3h in 70~90 ℃ of temperature environments and obtain modified Nano carbon fiber finished product;
Then, adopt the above-mentioned modified carbon nano-tubes of 16 ㎏, the above-mentioned modified Nano carbon fiber of 4 ㎏, 40 ㎏ polyfluoroethylene resins, 5 ㎏ 1-nitro-pyrrole alkane ketone, 10 ㎏ tetryl formates, 2 ㎏ dimethylbenzene, 1 ㎏ oxalic acid propylene diester, 0.25 ㎏ polydimethylsiloxane, 0.25 ㎏ PSI to be mixed and made into the electrical-conductive nanometer fluorocarbon coating.
Embodiment 2: at first, adopting following raw material and step to make caliber is Ф 100nm, the modified carbon nano-tubes that pipe range is 50 μ m:
(1), get CNT (carbon nano-tube) 30 ㎏ and drop in butanol solutions, be configured to the butanol solution that mass concentration is 8%, sonic oscillation 40min, evenly mix, and obtains the CNT (carbon nano-tube) mixed solution;
(2), by the weight ratio of step (1) gained CNT (carbon nano-tube) mixed solution 3%, getting silane coupling agent drops in deionized water, be configured to the aqueous solution that mass concentration is 6%, use oxalic acid to regulate pH value to 10, sonic oscillation 30min, make the prehydrolysis in deionized water of thrown silane coupling agent, obtain the silane coupling agent hydrolyzed solution;
(3), step (2) gained silane coupling agent hydrolyzed solution is added in step (1) gained CNT (carbon nano-tube) mixed solution, stir, insert sonic oscillation 10h in 70~90 ℃ of temperature environments and obtain the modified carbon nano-tubes finished product;
Secondly, adopting following raw material and step to make diameter of section is Ф 50nm, the modified Nano carbon fiber of long 1000 μ m:
(4), get carbon fiber 10 ㎏ and drop in butanol solutions, be configured to the butanol solution that mass concentration is 8%, sonic oscillation 40min, evenly mix, and obtains the carbon nano fiber mixed solution;
(5), by the weight ratio of step (4) gained carbon nano fiber mixed solution 3%, getting silane coupling agent drops in deionized water, be configured to the aqueous solution that mass concentration is 6%, use oxalic acid to regulate pH value to 10, sonic oscillation 30min, make the prehydrolysis in deionized water of thrown silane coupling agent, obtain the silane coupling agent hydrolyzed solution;
(6), step (5) gained silane coupling agent hydrolyzed solution is added in step (4) gained carbon nano fiber mixed solution, stir, insert sonic oscillation 10h in 70~90 ℃ of temperature environments and obtain modified Nano carbon fiber finished product;
Then, adopt the above-mentioned modified carbon nano-tubes of 30 ㎏, the above-mentioned modified Nano carbon fiber of 10 ㎏, 60 ㎏ polyfluoroethylene resins, 10 ㎏ 3-nitro-pyrrole alkane ketone, the different Ding Zhi of 20 formic acid ㎏, 5 ㎏ dimethylbenzene, 5 ㎏ oxalic acid propylene diesters, 1 ㎏ polydimethylsiloxane, 1 ㎏ PSI to be mixed and made into the electrical-conductive nanometer fluorocarbon coating.